Hello!
First of all, excuse my bad english. Im new at mathprog and trying to model
some problem i get as output some strange thing:
No. Row name Activity Lower bound Upper bound
------ ------------ ------------- ------------- -------------
.....
.....
7 constraint[1]
0 -0
8 constraint[2]
0 -0
9 constraint[3]
-3 -0
10 constraint[4]
-2 -0
I dont get why those values happen at this constraint, because neither of
the variables or values are negative in the first place. The constraint is
defined as follow:
s.t. constraint{j in 1..n}: sum{i in 1..m} d[i,j] <= m * y[j];
Where m is a param defined in the data, positive integer, y is a binary
variable and d[i,j] are real variables between 0 and 1 (0<=d<=1)
Any help would be greatly appreciated!! thanks in advance
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